Im wondering how much it matters what pump you use. If one could determine out put flow rates it seems any pump should work.
A different beast, but on my Landcruiser I installed a Saginaw pump off a Volvo 240 because Toyota pumps are getting very expensive and rebuilt ones are prone to failure. I know, quite a few differences in steering systems between that and the Milano, but the theory remains the same.
A word of caution when you are rebuilding a pump. The reason the Toyota rebuilt ones fail is because although the seals are replaced the wear is actually in the shaft and rebuilders have no way of repairing that so it doesn’t take long for the new seals to wear.
Not sure what the failure point is on Milano pumps.
87 Milano Platinum
76 Alfetta GT race car
70 Fulvia 1.3 Rally S
68 Fiat 850